/Engine/Source/Runtime/Renderer/Public/InstanceCulling/InstanceCullingContext.h
Allocate space for indirect draw call argumens for a given MeshDrawCommand and initialize with draw command data. TODO: support cached pre-allocated commands.
uint32 AllocateIndirectArgs ( const [FMeshDrawCommand](API\Runtime\Renderer\FMeshDrawCommand) * MeshDrawCommand )